Conceptual design of linear injector for SSC of HIRFL

Heavy Ion Research Facility at Lanzhou (HIRFL) consists of two cyclotrons (SFC and SSC), one synchrotron (CSRm), and one storage ring (CSRe). The two cyclotrons are in series as the injector of the synchrotron. An additional LINAC injector for SSC is considered to increase the beam time at targets, named SSC-LINAC. The new injector consists of an RFQ, four IH-DTL tanks. A pre-buncher is in the front of RFQ with frequency of 13 MHz to match the RF frequency of SSC. TRACE-3D, PARMTEQm, LINREV, BEAMPATH, and DAKOTA are used to design, optimize, and simulate the acceleration structures of SSC-LINAC. The energy of 0.97 MeV/u with spread of 0.5% and bunch length of 2.1 ns is achieved at the exit. These can match the ideal acceptance of SSC. A front-to-end simulation is done by BEAMPATH to benchmark the design.EI